Refined petroleum is used for far more than fuel. While gasoline, diesel, and jet fuel account for the largest share of every barrel of crude oil processed, the refining process also produces raw materials for plastics, synthetic fabrics, fertilizers, lubricants, medicines, and cosmetics. Nearly every industry on Earth depends on at least one product that traces back to a petroleum refinery.
Transportation Fuels
The most visible use of refined petroleum is powering vehicles, ships, and aircraft. Gasoline, diesel, and jet fuel together consume roughly 75% of every barrel of crude oil refined in the United States. Heating oil, which is chemically similar to diesel, warms millions of homes, particularly in the northeastern U.S. These fuels are separated from crude oil through a distillation process that sorts hydrocarbons by their boiling points, with lighter molecules becoming gasoline and heavier ones becoming diesel or fuel oil.
Plastics and Packaging
After fuels, plastics represent one of the highest-volume uses of refined petroleum. Refineries produce compounds called naphtha and ethane, which are “cracked” into smaller molecules like ethylene and propylene. These building blocks are then assembled into the plastics found in almost every consumer product.
Just seven types of petroleum-derived plastic cover roughly two-thirds of global plastic demand across packaging, construction, automotive, and electronics. The most common include polyethylene (used in grocery bags, bottles, and food wrap), polypropylene (food containers, car bumpers, medical devices), PVC (pipes, window frames, flooring), polystyrene (foam cups, insulation, packing peanuts), and PET (water bottles, polyester clothing). Your phone case, laptop housing, and the insulation around your home’s electrical wiring all start as refined petroleum.
Synthetic Fabrics
Polyester is a petroleum-derived fiber incorporated into about 60% of clothing worldwide. Unless your wardrobe is exclusively wool, cotton, linen, or silk, you’re wearing refined petroleum. Nylon, another petroleum product, shows up in everything from stockings to carpets to toothbrush bristles. Acrylic, the soft synthetic often blended into sweaters and blankets, is also petroleum-based. Rugs made with synthetic fibers typically use petroleum-based nylon or olefin.
These materials dominate the textile industry because they’re cheap to produce, durable, wrinkle-resistant, and easy to dye. The tradeoff is that they shed microplastic fibers during washing and take centuries to decompose in landfills.
Lubricants and Industrial Oils
Heavier fractions from petroleum refining become the base oils used in motor oil, transmission fluid, hydraulic fluid, and industrial greases. These lubricants reduce friction and heat in engines, machinery, and manufacturing equipment. Base oils are blended with chemical additives to meet specific performance standards for different applications.
Re-refined petroleum lubricants, made by reprocessing used motor oil, meet the same certification standards as virgin oils. Mercedes-Benz, for example, installs oil with re-refined content in new vehicles at the factory. This recycling loop means the same barrel of petroleum can serve as lubricant multiple times before it’s finally consumed as fuel or disposed of.
Agriculture and Fertilizers
Modern crop yields depend heavily on synthetic nitrogen fertilizers, and those fertilizers depend on fossil fuels. The process that makes this possible, developed by Fritz Haber and Carl Bosch in the early 1900s, combines atmospheric nitrogen with hydrogen under extreme heat and pressure to produce ammonia. Natural gas (a close cousin of petroleum, often extracted alongside it) supplies both the hydrogen and the energy needed for the reaction. This is why fertilizer prices closely track natural gas prices.
The ammonia produced through this process is either applied directly to fields (common for corn production in the Midwest) or converted into other fertilizer forms like urea, ammonium nitrate, and ammonium sulfate. These products are easier to store and handle than pure ammonia. Without this petroleum-linked chemistry, global food production could not support anywhere near the current world population.
Medicine and Skincare
Petroleum jelly, a highly refined form of petroleum, has been a staple in dermatology for over a century. It serves as a wound care essential by sealing moisture into damaged skin and creating a barrier against bacteria. Dermatologists also use it as a base for medicated ointments and as an instrument in allergy patch testing. Mineral oil, another refined petroleum product, appears in baby oil, moisturizers, and laxatives.
Beyond topical products, petroleum derivatives are precursors for many pharmaceutical compounds. Aspirin, antihistamines, and numerous other medications rely on petrochemical intermediates during their synthesis. The plastic syringes, IV bags, and tubing used in hospitals are also petroleum products.
Asphalt and Roofing
The heaviest, thickest residue left after refining crude oil becomes asphalt. It paves roads, waterproofs roofs, and seals parking lots. In the U.S. alone, roughly 27 million metric tons of asphalt are used annually for road construction and maintenance. Roofing shingles on most American homes contain an asphalt base layer that provides waterproofing, with granules on top for UV protection.
Waxes, Solvents, and Everyday Products
Paraffin wax, refined from petroleum, coats the inside of milk cartons, seals canning jars, and forms the body of most candles. Petroleum-based solvents dissolve grease and grime in cleaning products, paint thinners, and degreasers. Propane and butane, light gases separated during refining, fuel backyard grills, camping stoves, and cigarette lighters.
Even less obvious products trace back to refined petroleum: the synthetic rubber in your car’s tires, the detergent in your washing machine, the dye in your printer ink, and the adhesive holding together that cardboard box on your doorstep. A single 42-gallon barrel of crude oil, once refined, touches dozens of industries and hundreds of finished goods before its components are fully consumed.